Initial and Final Date of Freezing Temperatures and Annual U.S. Precipitation

Below you will find an assortment of U.S.
climate maps that should prove helpful in
planning a wide variety of activities.

Maps include:* The mean date of last freezing temperature (useful for planning spring planting).* The mean date of first freezing temperature at
the end of the growing season. * The median length of freeze-free period. * The total annual precipitation in inches.

Gardening
You'll need to take a number of weather factors
into consideration: * The average last date of frost in spring. * The average first date of frost in autumn. * The number of frost-free days you can
expect during the growing season. * The average rainfall amount for your area.

The following maps should be of use whether
you're trying to determine the optimum time
to plant a garden, the best time to harvest
your vegetables, or would like to determine if
your area offers adequate rainfall or a sufficient
growing season for certain plants, fruits or
vegetables you'd like to try.

Be sure and visit our page of plant hardiness zone maps
to ensure the garden vegetables, fruits and
trees you choose are suitable for your local
climate.

WARNING: Freezing temps can and occasionally do
occur after the above dates. Plan accordingly and be
prepared to protect your plants or seedlings from
frost.

Map showing the mean date of the first 32-degree temperature (first freeze)

Mean date of first freezing temperature at the end of the growing season

WARNING: Freezing temps can and occasionally do
occur before the above dates. Plan accordingly by being
prepared to either protect your plants, fruits and vegetables
from an early frost, or harvest them early, if you prefer.

U.S. map showing median length of freeze-free period

Median length of freeze-free period in the United States

WARNING: There are occasionally years when the freeze-free
period is substantially shorter than indicated on
the above map. Be sure you are prepared to protect
your plants and vegetables from both late-season
frost and an early arrival of freezing temperatures.

U.S. map showing annual precipitation in inches

Mean total precipitation in the United States

WARNING: There are occasionally years when the amount of
precipitation that falls is either substantially lower
or higher than indicated on the above map. Take this
into consideration if you lack irrigation.

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